Elements of a Valid Contract

An offer is a clear, definite proposal made by one party (the offeror) to another (the offeree) with the intent to create a binding agreement upon acceptance. In real estate, the purchase offer typically includes the identification of the parties, the property description, the purchase price, the financing terms, contingencies, the closing date, and the earnest money amount. An offer must be communicated to the offeree and must contain sufficiently definite terms to be enforceable.

Acceptance is the offeree's unqualified agreement to all terms of the offer. Acceptance must be communicated to the offeror and must mirror the offer exactly — any change to the terms constitutes a counteroffer rather than an acceptance, which terminates the original offer. In real estate, acceptance is typically evidenced by the offeree's signature on the offer document. The "mailbox rule" (acceptance is effective when dispatched) may apply in some states, but most modern real estate contracts specify that acceptance is effective only upon delivery to the offeror.

Consideration is the value exchanged between the parties — each party must give something of value and receive something of value. In a purchase contract, the buyer's consideration is the purchase price (or the promise to pay it), and the seller's consideration is the transfer of the property (or the promise to transfer it). Earnest money demonstrates the buyer's serious intent but is not technically required for valid consideration — the mutual promises are sufficient.

Capacity refers to the legal ability of the parties to enter into a contract. Parties must be of legal age (18 in most states), of sound mind, and not under the influence of substances that impair judgment. Contracts entered into by minors are generally voidable (the minor can cancel but the adult cannot). Contracts entered into by legally incompetent persons may be void (having no legal effect from the beginning). Legality requires that the contract's subject matter and purpose must be lawful. A contract to sell property for the purpose of operating an illegal business is void.

A valid contract contains all five essential elements and is fully enforceable. A void contract has no legal effect from the beginning — it is treated as if it never existed. Examples include contracts with illegal purposes or contracts signed by legally incompetent persons. A voidable contract is valid and enforceable but can be cancelled by one party due to circumstances such as fraud, duress, undue influence, mutual mistake, or the involvement of a minor.

An unenforceable contract meets all essential elements but cannot be enforced due to a procedural deficiency — most commonly, a real estate contract that is not in writing as required by the Statute of Frauds. The distinction between void and voidable is important: a void contract cannot be ratified or made valid, while a voidable contract can be ratified by the party with the right to void it (for example, a minor who reaches the age of majority can ratify a contract they entered as a minor).